In this field, type a colour. Colours may be specified in three ways.
Many colours are recognised by name, for example red
or blanched almond.
Grey levels are given by a single number from 0 (black) to 100 (white).
Other colours are given by three numbers between 0 and 100, separated
by hyphens (-). The first number indicates the level of red,
the second the level of green, and the third the level of blue. For
example, 0-0-100 means blue, and 100-100-0
gives yellow.